HR: 0800h
AN: SA21A-0265    [Abstracts]
TI: Large-scale Dynamics of Noctilucent Clouds Over Alaska, 2005
AU: * Nielsen, K
EM: knielsen73@gmail.com
AF: Computational Physics, Inc, 8001 Braddock Road, Suite 210, Springfield, VA 22151, United States
AU: * Nielsen, K
EM: knielsen73@gmail.com
AF: Space Science Division, Naval Research laboratory, Code 7641 Naval Research Laboratory 4555 Overlook Ave., SW, Washington, DC 20375, United States
AU: Jensen, P F
AF: Geophysical Institute, University of Alaska, Fairbanks, 903 Koyukuk Drive, Fairbanks, AK 99775, United States
AU: Taylor, M J
AF: Utah State University, Old Main Hill, Logan, UT 84322, United States
AU: Collins, R L
AF: Geophysical Institute, University of Alaska, Fairbanks, 903 Koyukuk Drive, Fairbanks, AK 99775, United States
AU: Kochenash, A J
AF: Computational Physics, Inc, 8001 Braddock Road, Suite 210, Springfield, VA 22151, United States
AU: Kochenash, A J
AF: Space Science Division, Naval Research laboratory, Code 7641 Naval Research Laboratory 4555 Overlook Ave., SW, Washington, DC 20375, United States
AU: Siskind, D E
AF: Space Science Division, Naval Research laboratory, Code 7641 Naval Research Laboratory 4555 Overlook Ave., SW, Washington, DC 20375, United States
AU: Stevens, M H
AF: Space Science Division, Naval Research laboratory, Code 7641 Naval Research Laboratory 4555 Overlook Ave., SW, Washington, DC 20375, United States
AU: Eckermann, S
AF: Space Science Division, Naval Research laboratory, Code 7641 Naval Research Laboratory 4555 Overlook Ave., SW, Washington, DC 20375, United States
AU: Murayama, Y
AF: National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo, NA 184-8795, Japan
AB: Noctilucent clouds (NLC) form in the coldest region that exist on Earth, near the polar summer mesopause at an altitude of approximately 83 km. Coincident ground-based observations of NLC were made from interior Alaska over a 3-day period in August, 2005, using imagers and lidar. The imagers were deployed at Donnelly Dome (63° N, 145° W) approximately 175 km south of the lidar facility. The observed NLC displays were unusually extensive considering the late season, filling the twilight sky from horizon-to-horizon and lasting >4 hours. In particular, the night of August 10 showed a remarkable display extending well south of the observation site (> 125° elevation). Recent modeling results (Berger and von Zahn, 2007) showed how meridional winds can transport the icy particles southward from their nucleation site. Co-located MF radar data support this suggestion. We compare these data with simulations by the NRL Navy Operational Global Atmospheric Prediction System- Advanced Level Physics and High Altitude (NOGAPS-ALPHA) as well as with published work by Berger and von Zahn, 2007.
DE: 3332 Mesospheric dynamics
DE: 3360 Remote sensing
DE: 3384 Acoustic-gravity waves
DE: 3389 Tides and planetary waves
DE: 3399 General or miscellaneous
SC: SPA-Aeronomy [SA]
MN: 2007 Fall Meeting